Always allow devicelockcontroller to schedule jobs/alarms in background

Bug: 290924390
Test: builld successfully
Test: flash aosp_mokey_go32-userdebug and go to settings,
      battery saving mode is fixed at unrestricted for dlc
Change-Id: I7a5be87b89b4f31e10e0b9c0d5fca21ed40f9f92

data/etc/platform.xml

@@ -346,4 +346,8 @@
 
     <!-- Allow IMS service entitlement app to schedule jobs to run when app in background. -->
     <allow-in-power-save-except-idle package="com.android.imsserviceentitlement" />
+
+    <!-- Allow device lock controller app to schedule jobs and alarms when app in background,
+        otherwise, it may not be able to enforce provision for managed devices. -->
+    <allow-in-power-save package="com.android.devicelockcontroller" />
 </permissions>